Xenon is a chemical element that has the symbol Xe and the atomic number 54. As a noble gas, this means that xenon is found naturally in the atmosphere and is not generally reactive with other elements. Although it is a minority element in air, xenon has many important uses in scientific research and industry. For example, it is commonly used in lamps for high-intensity lighting, such as those used in film projectors, because it emits a bright and consistent light. Additionally, xenon is often used in medical imaging equipment because it can be used to create contrast in magnetic resonance imaging (MRI) scans.